sub- +‎ frame


subframe (plural subframes)

English Wikipedia has an article on:
  1. A subsidiary frame (chunk of data).
    • 2001, John Watkinson, An introduction to digital video:
      Four status bits accompany each subframe.
  2. A structural component of a vehicle, such as an automobile or aircraft, that uses a discrete, separate structure within a larger body-on-frame or unit body to carry certain components, such as the engine, drivetrain, or suspension.
  3. (Internet) One of the HTML frames that make up a frameset.
    • 1998, Steven E Callihan, Create your first Web Page in a weekend
      Specify the dimensions of your main frame and subframes and this online utility will create them for you.